The Led Zeppelin reissue campaign continues in 2015, turning the spotlight on Physical Graffiti. The deluxe edition of the group's sixth studio album will arrive 40 years to the day after the original debuted on February 24, 1975. As with the previous deluxe editions, Physical Graffiti has been newly remastered by Jimmy Page and is accompanied by a disc of companion audio comprising previously unreleased music related to the original release.

Here’s a rare clip of two denim-clad musical legends performing together with acoustic guitars. It’s George Harrison and Bob Dylan rehearsing “If Not For You” before The Concert for Bangladesh in 1971. “If Not For You” was originally penned by Bob Dylan and appears on his 1970 album, New Morning. Soon after George Harrison released a version of the song on his post-Beatles masterwork, All Things Must Pass.

Uli Jon Roth will release a new double album, Scorpions Revisited, March 10 via UDR. The album will contain 19 "re-invented" Scorpions tracks. According to a press release about the album, no one in their right mind would dare call these mere re-recordings; it’s clear Roth reinvents these songs from the soul up.

Everyone eventually sits in with their spouse's Judas Priest cover band—and Dream Theater guitarist John Petrucci is no different! Below, watch Petrucci perform "Beyond the Realms of Death" with Judas Priestess, a band that happens to feature his wife, Rena Sands, on guitar.